Handel's monikers

Georg Frideric Handel composed 47 operas, on every classical deity and hero from Alexander to Xerxes (if only he'd thought to do Zeus!).

Of his 47 titles, 13 begin with the letter A:

Acis and Galatea
Admeto
Agrippina
Alceste
Alcina
Alessandro
Alessandro Severo
Almira
Amadigi di Gaula
Arianna in Creta
Ariodante
Arminio
and
Atalanta